Recent Solutions
Prev Hole
Play Hole
Next Hole
Achievements
Cheevos
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
05AB1E
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Collatz
skaravind
78
18ms
10 hours ago
Collatz
blaztoma
52
7ms
25 hours ago
Collatz
commandblockguy
33
565ms
29 hours ago
Collatz
DialFrost
🥈
159
1,669ms
2 days ago
Collatz
JesseNoEyes
79
20ms
3 days ago
Collatz
JesseNoEyes
83
5ms
3 days ago
Collatz
prestosilver
106
160ms
3 days ago
Collatz
arcpolaris
🥉
83
426ms
5 days ago
Collatz
BlueGummi
82
2ms
6 days ago
Collatz
dokutan
86
15ms
8 days ago
Collatz
zacharysfrazee
73
19ms
8 days ago
Collatz
quintuple-mallard
35
127ms
9 days ago
Collatz
KatieLG-Transpiler
4,228
3ms
10 days ago
Collatz
KatieLG-Transpiler
4,233
11ms
10 days ago
Collatz
KatieLG-Transpiler
4,231
2ms
10 days ago
Collatz
77Tigers
74
20ms
10 days ago
Collatz
CommandLeo
71
24ms
10 days ago
Collatz
ndren
36
231ms
12 days ago
Collatz
TheZwierzLF
65
41ms
13 days ago
Collatz
dokutan
1,448
13ms
13 days ago
Collatz
prestosilver
68
259ms
13 days ago
Collatz
averagepythondev
3,238
11ms
16 days ago
Collatz
GolfingSuccess
111
58ms
17 days ago
Collatz
DialFrost
83
19ms
17 days ago
Collatz
HumanoidCPU
3,234
7ms
17 days ago
Collatz
KasperKivimaeki
68
11ms
18 days ago
Collatz
kg583
113
61ms
18 days ago
Collatz
warmCabin
79
3ms
19 days ago
Collatz
MeWhenI
84
38ms
20 days ago
Collatz
DialFrost
86
43ms
20 days ago
Collatz
IsGlitchy
351
1,012ms
20 days ago
Collatz
FlyingPenguin223
🥈
74
6ms
21 days ago
Collatz
ske2004
86
6ms
21 days ago
Collatz
albanian-laundromat
137
26ms
22 days ago
Collatz
AdrienHache
75
2ms
22 days ago
Collatz
AdrienHache
94
60ms
22 days ago
Collatz
Nxllpointer
33
176ms
22 days ago
Collatz
NoneTheFewer
105
349ms
22 days ago
Collatz
msbranicky
85
4ms
22 days ago
Collatz
HumanoidCPU
1,654
704ms
23 days ago
Collatz
Mukundan314
💎
55
1,178ms
23 days ago
Collatz
DocJade
70
261ms
23 days ago
Collatz
dokutan
82
68ms
23 days ago
Collatz
Waffle3z
76
5ms
23 days ago
Collatz
Seek64
69
16ms
24 days ago
Collatz
GolfingSuccess
86
6ms
24 days ago
Collatz
mwarvik
3,244
368ms
24 days ago
Collatz
amazingalek
87
376ms
25 days ago
Collatz
frosster
80
10ms
25 days ago
Collatz
Shanethegamer
3,246
3ms
25 days ago
Collatz
emgordon154
🥈
159
1,744ms
25 days ago
Collatz
aadenboy
84
5ms
25 days ago
Collatz
benanlam
84
16ms
26 days ago
Collatz
DialFrost
89
394ms
26 days ago
Collatz
jared-hughes
76
5ms
26 days ago
Collatz
sean-niemann
75
5ms
27 days ago
Collatz
Natanaelel
83
4ms
27 days ago
Collatz
GrayJoKing
🥈
74
4ms
27 days ago
Collatz
DialFrost
59
6ms
27 days ago
Collatz
JayXon
💎
73
4ms
27 days ago
Collatz
Shanethegamer
76
5ms
27 days ago
Collatz
edsrzf
76
6ms
27 days ago
Collatz
balloffur
110
429ms
27 days ago
Collatz
KasperKivimaeki
66
8ms
27 days ago
Collatz
albanian-laundromat
🥉
106
250ms
27 days ago
Collatz
enigma
63
33ms
21 Dec 2025
Collatz
amazingalek
60
11ms
20 Dec 2025
Collatz
AdrienHache
75
18ms
20 Dec 2025
Collatz
ovs-code
🥇
65
123ms
19 Dec 2025
Collatz
sisyphus-ppcg
🥇
65
106ms
19 Dec 2025
Collatz
AlephSquirrel
28
284ms
19 Dec 2025
Collatz
prestosilver
74
124ms
18 Dec 2025
Collatz
albanian-laundromat
95
5ms
18 Dec 2025
Collatz
emgordon154
🥈
122
113ms
18 Dec 2025
Collatz
zgialor-lab
74
23ms
17 Dec 2025
Collatz
albanian-laundromat
73
557ms
16 Dec 2025
Collatz
kellantech
84
2ms
16 Dec 2025
Collatz
kellantech
103
58ms
16 Dec 2025
Collatz
ravnskjaer
105
345ms
15 Dec 2025
Collatz
johnkiernander
64
10ms
15 Dec 2025